Monday, September 27, 2010

There were two things, which were both very sad and happy in my life. So, I could not open the class of What is Life? in these days. I am very sorry. But in those days, there was an incredible news. The Tigers may be won in this season as a champion of the central league, is't it? It' too great for me. There may be a God as a "Life"?

The worm became to the pupa by control of the hormone, and the larval body was melted down by the activity of some protease. Therefore, when the pupal body of silk worms or beetles were injured by yourself, the white body fluid was leaked from the larval body. Of course, the pupa must be die by the reason. What was happen in the body of the pupa?

As you may think, all was not be melted down in the pupa's body. The process to be an adult is going on in the body. And also, you know that the stem cells have ability to differentiate to various cell types. In the truth, the egg has same character like such stem cells, and fertilized egg differentiate to all cell types to develop to be "Life". So the fertilized egg is a kind of embryonic stem cell. (Can you understand this joke?) Anyway, such cells in the larval body were called as "adult rudiments". They are waiting for "the Time".

The melted body fluid in the pupa was used as a source and energy to rebuild the adult body. This is the most interesting theme or mechanism in Developmental Biology. Many researcher are trying to elucidate the problem "What is Metamorphosis". One of the greatest researcher in the developmental biology area showed an article in Science at 1995. The title is following "Origin of Bilaterian Body Plans: Evolution of Developmental Regulatory Mechanisms"（PMID: 7481819）. The article had changed my life.

本日の講義は以上です。最後に、出欠をとります。以下のバナーをクリックしたことで「出席」と認めます。

Today's class is over. Be careful. It is rainy and cold. Please click the button at the bottom of this What is Life?, if you are a student of this class.

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Self Introduction

My name is Sammy (English name) or Hayato Minamoto (Japanese name). I have worked as a biologist. When I was a child just before entering to the elementary school, I decided to be a biologist when I become an adult. After obtaining of PhD, I have worked at ten institutes in Japan.

Now, I have two sons. They are 7 and 5 years old, respectively. They do not know about me, because they are too young. I wish my sons will understand me in future.

Therefore, I decided to explain the amazing things of Life for people by myself. I show my articles on “What is Life?” in both Japanese and English.

Today, I shall start the course of "What is Life?". Do not afraid of asking me any questions you like. I will answer your inquiry in serious and friendly manner. So please check my blog and leave comments.

Best regards. (2010. 06. 23 Sammy)

As my second blog, I have started "We Love SOMA" to show really amazing historical story in SOMA domain (now SOMA domain was decided into SOMA city and Minami SOMA city.)

Anyway, please check this blog as like as "What is Life?"
Best regards (2013.03.13)